Sentient ear buds that hate music involving anything other than instrumentals because they find human voices to be "displeasing". They will stop in the middle of the users playlist to complain about how bad their music selection is. Once in the user's ears they are incapable of movement, but before that will sometimes attempt to resist being used. They do this mostly by restraining the user until they agree not to use them, but will strangle people if they aren't cooperative. They are constantly sentient but only speak when plugged in.

Do you think it should be a joke SCP or just a normal one? Would you read it/ideas?

It depends. Joke SCPs are often laughable, but this seems more serious. I have a few questions on the idea: are the headphones only capable of sentience while plugged in? Do these headphones like a specific type of music?

Another thing to consider is what lengths the headphones will go to prevent being used. Will they just restrain, or attempt to kill them?

This could be really good if you developed the idea a tad more and wrote it really well.